I haven't done any mods to the car since I've had it, just basic tune up stuff to get it dependable. Today I purchased a k&n filter, the drop in, and did the sogi cai mod. The car feels so much more responsive. I mounted the hose slightly under the factory ic piping. It sounds so much different when I accelerate. Really had now idea how much a intake could do. Next will be downpipe and exhaust.